Rust-GCC

Issues somebody may already be working on are listed last. List everything by date

• gccrs not check comma in enum defination

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  Difficulty 2/5 1-3 hours Newbie friendliness 65/100

  Rust-GCC/gccrs#5069 · Opened Nov 7, 2026

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• Missing warning for unnecessary trailing semicolon

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  Difficulty 3/5 1-2 days Newbie friendliness 46/100

  Rust-GCC/gccrs#5060 · 2 comments · Opened Nov 5, 2026

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• ICE in is_refutable, at rust/hir/tree/rust-hir-pattern.h

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  Rust-GCC/gccrs#5052 · Opened Nov 3, 2026

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• ICE in fold_convert_loc, at fold-const.cc

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  Rust-GCC/gccrs#5051 · Opened Nov 3, 2026

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• ICE in is_refutable, at rust/hir/tree/rust-hir-pattern.h

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#5050 · Opened Nov 3, 2026

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• Rust ast builder still uses vector of `PathExprSegment`

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  AST expansion lowering

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  Rust-GCC/gccrs#5043 · 1 reaction · Opened Oct 31, 2026

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• segfault Rust::TyTy::BaseType::get_ref()

  May be free again @Diyan4444 claimed this 10 days ago, and no pull request is open. Open

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4992 · 1 comment · Opened Oct 10, 2026

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• segfault Rust::TyTy::BaseType::is_equal

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  Rust-GCC/gccrs#4991 · Opened Oct 10, 2026

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• segfault tree_class_check / build_pointer_type_for_mode

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  Rust-GCC/gccrs#4990 · Opened Oct 10, 2026

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• ICE in lookup_or_add_type, at rust/typecheck/rust-tyty-variance-analysis.cc

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4989 · Opened Oct 10, 2026

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• ICE in constructor_expression, at rust/rust-gcc.cc

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  Rust-GCC/gccrs#4988 · Opened Oct 10, 2026

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• ICE in get_fn_addr_from_dyn, at rust/backend/rust-compile-expr.cc

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  Rust-GCC/gccrs#4987 · Opened Oct 10, 2026

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• ICE in resolve_method_address, at rust/backend/ru

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  Rust-GCC/gccrs#4986 · Opened Oct 10, 2026

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• ICE tree check: expected integer_type or enumeral_type or boolean_type or real_type or fixed_point_type or bitint_type, have record_type in get_type_static_bounds, at tree.cc

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  Rust-GCC/gccrs#4985 · 1 comment · Opened Oct 10, 2026

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• ICE in as_a, at machmode.h:391 , repr simd + never

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  Rust-GCC/gccrs#4984 · Opened Oct 10, 2026

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• Support mrustc/minicargo for gccrs’s bootstrap

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  Difficulty 5/5 Over a week Newbie friendliness 22/100

  Rust-GCC/gccrs#4982 · 2 comments · 3 reactions · Opened Oct 9, 2026

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• match on bool: exhaustiveness not checked

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  Difficulty 3/5 1-2 days Newbie friendliness 55/100

  Rust-GCC/gccrs#4967 · 4 comments · Opened Oct 6, 2026

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• Check for pointee of derive(CoercePointee) to be marked ?Sized

  May be free again @wesley-lewis claimed this 31 days ago, and no pull request is open. Open

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  Difficulty 3/5 1-2 days Newbie friendliness 70/100

  Rust-GCC/gccrs#4965 · 1 assignee · Opened Oct 6, 2026

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• returning reference to local struct should be denied

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  Difficulty 3/5 1-2 days Newbie friendliness 58/100

  Rust-GCC/gccrs#4941 · Opened Sep 27, 2026

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• while loop on uninitialised binding not rejected

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  Difficulty 3/5 1-2 days Newbie friendliness 55/100

  Rust-GCC/gccrs#4939 · Opened Sep 26, 2026

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• mismatched types

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  typechecking

  Difficulty 4/5 3-5 days Newbie friendliness 50/100

  Rust-GCC/gccrs#4904 · Opened Sep 17, 2026

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• Investigate proper Rust CFI implementation

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  codegen rust-for-linux

  Difficulty 5/5 Over a week Newbie friendliness 35/100

  Rust-GCC/gccrs#4876 · 2 reactions · Opened Sep 10, 2026

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• Follow up to 4735

  May be free again @P-E-P claimed this 64 days ago, and no pull request is open. Open

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  bug

  Rust-GCC/gccrs#4849 · 1 assignee · Opened Sep 6, 2026

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• Handle `cfi_encoding` attribute

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  codegen rust-for-linux

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  Rust-GCC/gccrs#4842 · Opened Sep 3, 2026

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• Handle `derive_coerce_pointee` feature and associated `derive(CoercePointee)`

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  rust-for-linux typechecking

  Difficulty 5/5 Over a week Newbie friendliness 35/100

  Rust-GCC/gccrs#4839 · 1 comment · Opened Sep 3, 2026

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• Handle arbitrary self types

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  codegen name resolution parser rust-for-linux typechecking

  Difficulty 5/5 Over a week Newbie friendliness 25/100

  Rust-GCC/gccrs#4838 · Opened Sep 3, 2026

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• Compile `PLATFORM_INTRINSIC` ABI extern functions

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  codegen core

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4819 · 1 comment · Opened Aug 25, 2026

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• ICE `tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in type_hasher, at rust/backend/rust-compile-context.cc:`

  May be free again @philberty claimed this 85 days ago, and no pull request is open. Open

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  bug

  Rust-GCC/gccrs#4742 · 1 assignee · Opened Jul 31, 2026

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• ICE tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in build_array_type_1, async fn array

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 65/100

  Rust-GCC/gccrs#4741 · Opened Jul 31, 2026

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• ICE in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:285

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  Rust-GCC/gccrs#4738 · Opened Jul 31, 2026

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• ICE in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:103

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  bug

  Difficulty 3/5 1-2 days Newbie friendliness 68/100

  Rust-GCC/gccrs#4737 · 1 comment · Opened Jul 31, 2026

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• ICE in eval_component_reference, at rust/backend/rust-constexpr.cc , const casting

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  Rust-GCC/gccrs#4734 · Opened Jul 31, 2026

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• ICE in as_string, at rust/typecheck/rust-tyty-variance-analysis.cc: recursive struct

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4733 · Opened Jul 31, 2026

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• ICE in insert_ast_item when the same crate is declared twice under different names

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  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  Rust-GCC/gccrs#4724 · 2 comments · Opened Jul 28, 2026

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• Double drop when `break` precedes a local declaration in the same scope

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4717 · Opened Jul 22, 2026

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• Make function-scope drop aligns to rustc

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  Difficulty 5/5 Over a week Newbie friendliness 35/100

  Rust-GCC/gccrs#4712 · Opened Jul 19, 2026

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• Failed to lookup type reference for associated type in where-clause bound

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  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  Rust-GCC/gccrs#4708 · Opened Jul 16, 2026

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• Lang item attributes are not handled on enum variants

  May be free again @powerboat9 claimed this 118 days ago, and no pull request is open. Open

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  Rust-GCC/gccrs#4703 · 1 comment · 1 assignee · Opened Jul 13, 2026

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• Handle ambiguous glob import of `panic!`

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  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  Rust-GCC/gccrs#4701 · 1 comment · Opened Jul 12, 2026

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• Invalid `extended_key_value_attribute` error

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  expansion name resolution parser

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4690 · 3 comments · Opened Jul 7, 2026

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• E0428 when enum variant and generic parameter share the same name

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  name resolution subset-error

  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4687 · Opened Jul 7, 2026

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• segfault pp_token_begin_quote

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  Rust-GCC/gccrs#4677 · Opened Jun 30, 2026

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• ICE in compile_function fn that calls a main() with arguments

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  Rust-GCC/gccrs#4669 · Opened Jun 29, 2026

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• ICE in build2, at tree.cc, recursive const fn

  May be free again @philberty claimed this 67 days ago, and no pull request is open. Open

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  bug const-generics

  Rust-GCC/gccrs#4667 · 1 assignee · Opened Jun 29, 2026

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• C-variadic function definitions are rejected, blocking varargs_without_pattern lint

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  missing-lint parser

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  Rust-GCC/gccrs#4657 · 1 comment · Opened Jun 28, 2026

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• Associated-type where clause is only parsed in the deprecated position, blocking deprecated_where_clause_location lint

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  Difficulty 3/5 1-2 days Newbie friendliness 65/100

  Rust-GCC/gccrs#4656 · Opened Jun 28, 2026

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• Test-harness attribute macros are stripped before HIR, blocking duplicate_macro_attributes lint

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  missing-lint

  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  Rust-GCC/gccrs#4655 · 1 comment · Opened Jun 28, 2026

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• Single argument `assert!` message

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  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  Rust-GCC/gccrs#4635 · Opened Jun 27, 2026

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• ICE in struct_field_expression (match)

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 55/100

  Rust-GCC/gccrs#4619 · 1 reaction · Opened Jun 26, 2026

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• ICE: NR2: segfault with edition 2018

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  bug

  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  Rust-GCC/gccrs#4618 · Opened Jun 25, 2026

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